While the facts of ownership may be cloudy, there are several things that are clear:
1)The service works very well. I tested it with 7 calls this morning and only ran into problems on one business name (and no place names) out of the seven attempts and that was the try with the radio blaring. I have started using it instead of my contact directory which can be distracting when driving down the road.
2)It definitely uses the Google Maps local data set. I have optimized the business titles for several local businesses in the Google Local Business Center and those titles are listed in 520-FIND verbatim.
If you haven’t tried the service yet, you should. It demonstrates how local data is quickly being pushed out into the world.